A loading height limiting device for fastener heat treatment

Abstract

This invention belongs to the field of fastener processing technology, and in particular, it is a loading height limiting device for fastener heat treatment. It includes a base plate, with a vibration assembly mounted on the top of the base plate. There are two sets of vibration assemblies, and a first conveyor frame and a second conveyor frame are respectively mounted on the top of the two sets of vibration assemblies. The first conveyor frame is located diagonally above the second conveyor frame. This loading height limiting device for fastener heat treatment generates magnetic attraction by connecting a magnetic attraction mechanism to a power source, which attracts the sealing plate to the side of the receiving plate, preventing bolts on the receiving plate from falling. Simultaneously, it creates a magnetic attraction effect on the bolts on the surface of the receiving plate, preventing bolts from falling due to inertia caused by vibration during transport. The material on the bearing platform no longer increases. Thus, under the action of the vibration assembly, the accumulation thickness of bolts on the bearing platform is reduced, achieving a uniform distribution of bolts entering the heat treatment device and improving the heat treatment effect of the bolts.

Description

Technical Field

[0001] This invention relates to the field of fastener processing technology, specifically to a loading height limiting device for fastener heat treatment. Background Technology

[0002] Bolts are widely used and generally consist of two parts: a head and a shank. They can be used with nuts to fasten two parts with through holes. In actual production, small fastening parts such as shanks and nuts are basically mass-produced. The current bolt processing technology is also very mature, generally including forming processing with a multi-station cold heading machine and heat treatment. The multi-station cold heading machine can process raw materials into shaped bolts, while heat treatment can strengthen the yield strength of the bolt and improve its service life.

[0003] However, there are also shortcomings in the existing process. In the existing process, the bolts processed on the cold heading machine are collected first, and then piled into the quenching furnace for quenching treatment, and piled into the tempering furnace for tempering treatment. This will result in the bolts inside the bolt pile being heated less than the bolts on the outside of the bolt pile. This will result in uneven heating of the bolts in the bolt pile, resulting in inconsistent bolt quality.

[0004] Patent CN108927475B discloses a bolt processing system, relating to the field of bolt processing technology. This solution includes a cold heading machine, a sorting guide rail, a feeding mechanism, a quenching furnace, and a tempering furnace. The sorting guide rail guides the bolts discharged one by one from the cold heading machine into the feeding mechanism. The feeding mechanism, filled with bolts, is then sequentially placed into the quenching and tempering furnaces for heat treatment. Because the bolts do not stack, the heating of each bolt is more uniform, resulting in finished bolts with similar quality. While the aforementioned patent prevents bolt stacking, the excessive dispersion of individual bolts leads to insufficient heat utilization, severely impacting the efficiency of bolt heat treatment. Furthermore, bolts themselves have a certain thermal conductivity, and even bolts in contact will be heated uniformly. Therefore, controlling the thickness of the bolt stack is the key to improving bolt heating efficiency and accelerating heat treatment. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a loading height limiting device for fastener heat treatment, which solves the current problems.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a loading height limiting device for fastener heat treatment, comprising a base plate, a vibration assembly mounted on the top of the base plate, two sets of vibration assemblies, and a first conveyor frame and a second conveyor frame respectively mounted on the top of the two sets of vibration assemblies, the first conveyor frame being located above one side of the second conveyor frame, the inner side of the second conveyor frame being connected to the bottom edge of the first conveyor frame by a connecting inclined plate, a receiving plate being fixedly mounted on the inner side of the first conveyor frame, a magnetic attraction mechanism being mounted on the inner side of the receiving plate, a second balance column being fixedly mounted on the inner side of the first conveyor frame, a sleeve column being rotatably sleeved on the outer side of the second balance column, and a sealing plate that can be attracted by the magnetic attraction mechanism being fixedly mounted on the bottom of the sleeve column.

[0007] As a preferred embodiment of the present invention, the vibration assembly includes a support column fixedly installed on the top of the base plate, a balance platform fixedly installed on the top of the support column, a controller installed on the side of the balance platform, a vibrator installed on the top of the balance platform via a base, the bottoms of the two vibrators being connected to the bottoms of the first conveyor frame and the second conveyor frame, a first support frame fixedly installed on the top of the base plate and movably connected to the bottom of the first conveyor frame, and a second support frame fixedly installed on the top of the base plate and movably connected to the bottom of the second conveyor frame.

[0008] As a preferred embodiment of the present invention, the sealing plate has a snap-fit ​​groove on the side near the receiving plate that matches the bottom edge of the receiving plate.

[0009] As a preferred embodiment of the present invention, the receiving plate has an inner cavity on its inner side, and an inner groove communicating with the inner cavity is formed on the side of the receiving plate near the sealing plate. The magnetic attraction mechanism includes a copper rod inserted into the inner side of the inner groove and a coil wound on the surface of the copper rod. One end of the copper rod extends into the inner cavity, and the end face of the other end of the copper rod is flush with the side of the receiving plate.

[0010] As a preferred embodiment of the present invention, a support platform is fixedly installed at the bottom of the inner side of the first conveyor frame, and an inclined platform connected to the side of the support platform is fixedly installed at the bottom of the inner side of the first conveyor frame. A bearing platform connected to the inner side of the first conveyor frame is fixedly installed on the side of the inclined platform away from the support platform.

[0011] As a preferred embodiment of the present invention, the top of the bearing platform is provided with uniformly distributed resistance grooves, the inclined surface of the tilting platform is equipped with a buffer pad, and the top of the support platform is connected to the bottom of the receiving plate through a connecting seat.

[0012] As a preferred embodiment of the present invention, a first balance column is rotatably connected to the inner side of the first conveyor frame, the first balance column is located directly above the bearing platform, a drive motor is installed on the outer side of the first conveyor frame, a reducer is installed at the output end of the drive motor, the output end of the reducer passes through the first conveyor frame and is connected to the first balance column, symmetrically distributed annular toothed discs are fixedly sleeved on the outer side of the first balance column, a suspension chain is meshed with the outer side of the annular toothed discs, a gravity plate is fixedly connected to one end of the suspension chain, a gravity rod is fixedly installed at the other end of the suspension chain, and a baffle is fixedly installed at the bottom of the gravity plate.

[0013] As a preferred embodiment of the present invention, a separation plate with equal spacing is fixedly installed on the bottom of one side of the baffle, and the end of the separation plate away from the baffle and the bottom of the baffle are both tapered.

[0014] As a preferred embodiment of the present invention, the first conveyor frame has symmetrically distributed limiting grooves on its side. The two sides of the gravity plate are slidably connected to the inner sides of the two limiting grooves. The two ends of the gravity plate have symmetrically distributed through grooves. A vertical rod fixedly connected to the inner side of the limiting groove is slidably inserted into the inner side of the through groove. A limiting spring is sleeved on the outer side of the vertical rod. The two ends of the limiting spring are fixedly connected to the inner side of the limiting groove and the outer side of the gravity plate, respectively.

[0015] As a preferred embodiment of the present invention, a proximity switch is installed on the inner side of the first conveyor frame, and there is a signal connection between the proximity switch and the controller. The proximity switch is located between the sealing plate and the baffle.

[0016] Compared with the prior art, the present invention provides a loading height limiting device for fastener heat treatment, which has the following advantages:

[0017] 1. This loading height limiting device for fastener heat treatment generates magnetic attraction by connecting the magnetic attraction mechanism to the power supply, which attracts the sealing plate to the side of the receiving plate, preventing the bolts on the receiving plate from falling. At the same time, it creates a magnetic attraction effect on the bolts on the surface of the receiving plate, preventing the bolts from falling due to inertia caused by vibration during conveying. The material on the bearing platform no longer increases. Thus, under the action of the vibration component, the accumulation thickness of the bolts on the bearing platform is reduced, achieving uniform distribution of bolts entering the heat treatment device and improving the heat treatment effect of the bolts.

[0018] 2. By setting up a support platform and a bearing platform, the bolts during the conveying process are divided into two conveying paths, one above and one below, which facilitates the handling of accumulated bolts. At the same time, when the bolts fall onto the inclined platform and slide onto the bearing platform, the distribution of the bolts can be disrupted again, making the bolts distributed on the bearing platform more even and avoiding the accumulation of bolts in patches.

[0019] 3. The reducer drives the first balance column to rotate, and the ring gear drives the suspension chain to move, causing the gravity plate to descend and the gravity bar to rise. The gravity plate drives the baffle to descend and gradually approach the upper surface of the bearing platform. The bottom of the baffle will block the bolts that are too thick. As the bolts vibrate and are conveyed, the material on the bearing platform is smoothed out, ensuring that the bolts are evenly distributed.

[0020] 4. When the proximity switch detects that the height of the bolts being transported on the bearing platform exceeds the set height, i.e., the bolts are too close to the proximity switch, it indicates that the bolt accumulation thickness is too thick. The proximity switch will send a signal to the controller, which will then control the drive motor to run, lower the baffle, and simultaneously control the coil to connect external current to attract the sealing plate, reducing the thickness of the bolts during vibration transport. This ensures uniform bolt transport, allowing for precise control of the amount of bolts falling onto the second conveyor frame, forming a standardized heat treatment load, ensuring the effectiveness of heat treatment, and improving the mechanical properties of the bolts after heat treatment. Attached Figure Description

[0021] Figure 1 It is a schematic diagram of the structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the internal structure distribution of the receiving plate of the present invention;

[0023] Figure 3 This is a schematic diagram of the structure near the sealing plate of the present invention;

[0024] Figure 4 This is a schematic diagram of the structure near the tilting platform of the present invention;

[0025] Figure 5 This is a schematic diagram of the structure near the first balancing column of the present invention;

[0026] Figure 6 For the present invention Figure 5 A magnified view of a portion of point A in the middle;

[0027] Figure 7 This is a schematic diagram of the structural distribution near the gravity plate of the present invention;

[0028] Figure 8 For the present invention Figure 7 A magnified view of a portion of point B in the middle.

[0029] In the diagram: 1. Base plate; 2. First support frame; 3. Second support frame; 4. Vibration assembly; 41. Support column; 42. Balance platform; 43. Controller; 44. Base; 45. Vibrator; 5. First conveyor frame; 51. Drive motor; 52. Reducer; 53. Proximity switch; 6. First balance column; 61. Ring gear disc; 62. Suspension chain; 63. Gravity plate; 64. Baffle; 65. Gravity bar; 66. Separator plate; 7. Through slot; 7. Second balance column; 71. Sleeve column; 72. Sealing plate; 73. Snap-fit ​​slot; 8. Receiving plate; 81. Inner cavity; 82. Copper rod; 83. Inner groove; 84. Coil; 9. Limiting groove; 91. Vertical rod; 92. Limiting spring; 10. Support platform; 101. Inclined platform; 102. Bearing platform; 103. Connecting seat; 104. Buffer pad; 105. Resistance groove; 11. Connecting inclined plate; 12. Second conveyor frame. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Example 1

[0032] Please see Figure 1-8In this embodiment: a loading height limiting device for fastener heat treatment includes a base plate 1. A vibration assembly 4 is mounted on the top of the base plate 1. There are two sets of vibration assemblies 4, and a first conveyor frame 5 and a second conveyor frame 12 are respectively mounted on the top of the two sets of vibration assemblies 4. The first conveyor frame 5 is located above one side of the second conveyor frame 12. The inner side of the second conveyor frame 12 is connected to the bottom edge of the first conveyor frame 5 via a connecting inclined plate 11. A receiving plate 8 is fixedly mounted on the inner side of the first conveyor frame 5. A magnetic attraction mechanism is mounted on the inner side of the receiving plate 8. A second balance column 7 is fixedly mounted on the inner side of the first conveyor frame 5. A sleeve column 71 is rotatably sleeved on the outer side of the second balance column 7. A sealing plate 72, which can be attracted by the magnetic attraction mechanism, is fixedly mounted at the bottom of the sleeve column 71. This device is placed before the cold heading machine and the heat treatment device. The receiving plate 8 receives the material from the cold heading machine. When bolts arrive, the vibration assembly 4 is activated, causing the first conveyor frame 5 to vibrate. This causes the bolts on the receiving plate 8 to vibrate and be continuously conveyed and advanced. The bolts fall onto the inclined platform 101 through the receiving plate 8, and then are conveyed out of the first conveyor frame 5 through the carrying platform 102. They then fall onto the second conveyor frame 12 through the connecting inclined plate 11. The second conveyor frame 12 is connected to the heat treatment device. During the conveying process, when the bolts on the carrying platform 102 accumulate too thickly, the magnetic attraction mechanism is powered on to generate magnetic attraction, which attracts the sealing plate 72 to the side of the receiving plate 8, preventing the bolts on the receiving plate 8 from falling. The material on the carrying platform 102 no longer increases. In this way, under the action of the vibration assembly 4, the accumulation thickness of the bolts on the carrying platform 102 is reduced, achieving a uniform distribution of bolts entering the heat treatment device and improving the heat treatment effect of the bolts.

[0033] In a preferred embodiment, the vibration assembly 4 includes a support column 41 fixedly installed on the top of the base plate 1. A balance platform 42 is fixedly installed on the top of the support column 41. A controller 43 is installed on the side of the balance platform 42. A vibrator 45 is installed on the top of the balance platform 42 via a base 44. The bottoms of the two vibrators 45 are connected to the bottoms of the first conveyor frame 5 and the second conveyor frame 12. A first support frame 2, which is movably connected to the bottom of the first conveyor frame 5, is fixedly installed on the top of the base plate 1. A second support frame 3, which is movably connected to the bottom of the second conveyor frame 12, is fixedly installed on the top of the base plate 1. By starting the vibrator 45, in conjunction with the movably connected first support frame 2 and second support frame 3, the first conveyor frame 5 and the second conveyor frame 12 can continuously and stably push the material while vibrating. The vibration effect of the vibrator 45 can separate tangled bolts under the vibration action, effectively avoiding the phenomenon of multiple bolts accumulating in a piece during the conveying process, and further enhancing the uniformity of screw conveying.

[0034] As a preferred embodiment, the sealing plate 72 has a snap-fit ​​groove 73 on the side near the receiving plate 8 that is adapted to the bottom edge of the receiving plate 8. When the sealing plate 72 is attached to the side of the receiving plate 8, the snap-fit ​​groove 73 will snap onto the edge of the receiving plate 8, further strengthening the tightness of the connection between the sealing plate 72 and the receiving plate 8 and preventing the bolts from falling off.

[0035] In a preferred embodiment, a support platform 10 is fixedly installed at the bottom inner side of the first conveyor frame 5, and an inclined platform 101 connected to the side of the support platform 10 is fixedly installed at the bottom inner side of the first conveyor frame 5. A bearing platform 102 connected to the inner side of the first conveyor frame 5 is fixedly installed on the side of the inclined platform 101 away from the support platform 10. By setting the support platform 10 and the bearing platform 102, the bolts in the conveying process are divided into two conveying paths, which facilitates the handling of accumulated bolts. At the same time, when the bolts fall onto the inclined platform 101 and slide onto the bearing platform 102, the distribution of the bolts can be disrupted again, making the bolts distributed on the bearing platform 102 more uniform and avoiding the accumulation of bolts in patches.

[0036] Example 2

[0037] Please see Figure 1-8 In this embodiment: an inner cavity 81 is provided on the inner side of the receiving plate 8, and an inner groove 83 communicating with the inner cavity 81 is provided on the side of the receiving plate 8 near the sealing plate 72. The magnetic attraction mechanism includes a copper rod 82 inserted into the inner side of the inner groove 83 and a coil 84 wound on the surface of the copper rod 82. One end of the copper rod 82 extends into the inner cavity 81, and the end face of the other end of the copper rod 82 is flush with the side of the receiving plate 8. When the coil 84 is powered on, the copper rod 82 will generate magnetic attraction, thereby causing the surface and end face of the receiving plate 8 to generate a magnetic attraction effect, attracting the sealing plate 72 and preventing the bolts on the receiving plate 8 from falling off. At the same time, it generates a magnetic attraction effect on the bolts on the surface of the receiving plate 8, preventing the bolts from falling off due to inertia caused by vibration during transportation.

[0038] In a preferred embodiment, the top of the bearing platform 102 is provided with uniformly distributed resistance grooves 105, and the inclined surface of the tilting table 101 is equipped with a buffer pad 104. The top of the support platform 10 is connected to the bottom of the receiving plate 8 through the connecting seat 103. By setting the buffer pad 104, the bolts falling from the receiving plate 8 are inertially buffered, reducing noise and effectively protecting the equipment. By setting the resistance grooves 105, the bolts are vibrated and conveyed on the bearing platform 102, and the bottom is blocked by the resistance grooves 105, which disperses the accumulated bolts and further improves the uniformity of bolt distribution during vibration conveying.

[0039] Example 3

[0040] Please see Figure 1-8In this embodiment: a first balance column 6 is rotatably connected to the inner side of the first conveyor frame 5. The first balance column 6 is located directly above the bearing platform 102. A drive motor 51 is installed on the outer side of the first conveyor frame 5. A reducer 52 is installed at the output end of the drive motor 51. The output end of the reducer 52 passes through the first conveyor frame 5 and is connected to the first balance column 6. Symmetrically distributed annular toothed discs 61 are fixedly sleeved on the outer side of the first balance column 6. A suspension chain 62 is meshed with the outer side of the annular toothed discs 61. A gravity plate 63 is fixedly connected to one end of the suspension chain 62, and a gravity rod 65 is fixedly installed at the other end of the suspension chain 62. The bottom of the gravity plate 63... A baffle 64 is fixedly installed. Under normal conditions, the gravity plates 63 and gravity bars 65 installed on both sides of the suspension chain 62 maintain a balanced state. When the material on the bearing platform 102 is too thick, the drive motor 51 is started and runs. The reducer 52 drives the first balance column 6 to rotate, and the ring gear 61 drives the suspension chain 62 to move, causing the gravity plates 63 to descend and the gravity bars 65 to rise. The gravity plates 63 drive the baffle 64 to descend and gradually approach the upper surface of the bearing platform 102. The bottom of the baffle 64 will block the bolts that are too thick. With the vibration of the bolts, the material on the bearing platform 102 is smoothed out, ensuring that the bolts are evenly distributed.

[0041] In a preferred embodiment, a set of equally spaced separation plates 66 are fixedly installed on the bottom side of the baffle 64 near the sealing plate 72. The end of the separation plate 66 away from the baffle 64 and the bottom of the baffle 64 are both tapered. The separation plate 66 and the baffle 64 block the bolts located above, while the separation plate 66 divides the blocked bolts into multiple areas to prevent the bolts from accumulating in the same place and affecting the uniformity of the smoothing process. The tapered design makes the contact between the bolts and the separation plate 66 and the baffle 64 more stable, improving the stability of the bolt vibration conveying process.

[0042] In a preferred embodiment, the first conveyor frame 5 has symmetrically distributed limiting grooves 9 on its side. The two sides of the gravity plate 63 are slidably connected to the inner sides of the two limiting grooves 9 respectively. The two ends of the gravity plate 63 have symmetrically distributed through grooves 67. The inner side of the through groove 67 is slidably inserted with a vertical rod 91 fixedly connected to the inner side of the limiting groove 9. The outer side of the vertical rod 91 is fitted with a limiting spring 92. The two ends of the limiting spring 92 are fixedly connected to the inner side of the limiting groove 9 and the outer side of the gravity plate 63 respectively. The limiting spring 92 is always in a compressed state. During the descent of the gravity plate 63, it will slide on the vertical rod 91. The vertical rod 91 improves the stability of the descent of the gravity plate 63. At the same time, the limiting spring 92 will strengthen the stability of the descent of the gravity plate 63, further strengthening the stability of the descent process of the gravity plate 63, ensuring that the baffle 64 can descend smoothly to the specified height, and blocking and smoothing the bolts.

[0043] In a preferred embodiment, a proximity switch 53 is installed on the inner side of the first conveyor frame 5. The proximity switch 53 is connected to the controller 43 by a signal. The proximity switch 53 is located between the sealing plate 72 and the baffle 64. The proximity switch 53 is installed above the bearing platform 102 and can detect the vertical distance between the bolt and the proximity switch 53 (this is the prior art). When the proximity switch 53 detects that the height of the bolt being transported on the bearing platform 102 by vibration exceeds the set height, that is, when the distance between the bolt and the proximity switch 53 is too close, it indicates that the bolt accumulation thickness is too thick. The proximity switch 53 will send a signal to the controller 43, which will then control the drive motor 51 to run, lower the baffle 64, and at the same time control the coil 84 to connect the external current to attract the sealing plate 72, thereby reducing the thickness of the bolt during vibration transport and ensuring uniform bolt transport. This allows the amount of bolts falling onto the second conveyor frame 12 to be precisely controlled, forming a standardized heat treatment load, ensuring the effect of heat treatment, and improving the mechanical properties of the bolts after heat treatment.

[0044] The above solution can be used not only for conveying bolts during heat treatment, but also for loading and conveying other fasteners and small parts during heat treatment.

[0045] The working principle and usage process of this invention: The device is placed before the cold heading machine and the heat treatment device. The receiving plate 8 receives the bolts coming out of the cold heading machine. The vibration component 4 is activated to drive the first conveyor frame 5 to vibrate, so that the bolts on the receiving plate 8 are continuously conveyed and pushed forward while vibrating. The bolts fall onto the inclined table 101 through the receiving plate 8, and then are conveyed out of the first conveyor frame 5 through the bearing platform 102. They fall onto the second conveyor frame 12 through the connecting inclined plate 11. The second conveyor frame 12 is connected to the heat treatment device to realize the continuous conveying of the bolts for heat treatment. When the proximity switch 53 detects that the height of the bolt being vibrated and transported on the bearing platform 102 exceeds the set height, that is, when the distance between the bolt and the proximity switch 53 is too close, it indicates that the bolt accumulation thickness is too thick. The proximity switch 53 will send a signal to the controller 43, and the controller 43 will control the drive motor 51 to run, which drives the first balance column 6 to rotate through the reducer 52, and the annular gear disc 61... The suspension chain 62 moves, causing the gravity plate 63 to descend and the gravity rod 65 to rise. The gravity plate 63 drives the baffle 64 to descend, gradually approaching the upper surface of the bearing platform 102. The bottom of the baffle 64 will block excessively thick bolts. As the bolts are conveyed by vibration, the material on the bearing platform 102 is smoothed, ensuring the uniform distribution of bolts. At the same time, the controller 43 controls the coil 84 to connect to the external current, and the copper rod 82 will generate magnetic attraction, which will cause the surface and end face of the receiving plate 8 to have a magnetic attraction effect, attracting the sealing plate 72 to the side of the receiving plate 8, so that the bolts on the receiving plate 8 cannot fall, and the material on the bearing platform 102 will no longer increase. In this way, under the action of the vibration component 4, the thickness of the bolts accumulated on the bearing platform 102 will be reduced, so that the bolts entering the heat treatment device are evenly distributed, improving the heat treatment effect of the bolts. At the same time, the magnetic attraction effect on the bolts on the surface of the receiving plate 8 prevents the bolts from falling due to inertia caused by vibration conveying.

Claims

1. A loading height limiting device for heat treatment of fasteners, comprising a base plate (1), characterized in that: The top of the base plate (1) is equipped with a vibration assembly (4). There are two sets of vibration assemblies (4), and the top of the two sets of vibration assemblies (4) are respectively equipped with a first conveyor frame (5) and a second conveyor frame (12). The first conveyor frame (5) is located above one side of the second conveyor frame (12). The inner side of the second conveyor frame (12) is connected to the bottom edge of the first conveyor frame (5) by a connecting inclined plate (11). The inner side of the first conveyor frame (5) is fixedly equipped with a receiving plate (8). The inner side of the receiving plate (8) is equipped with a magnetic attraction mechanism. The inner side of the first conveyor frame (5) is fixedly equipped with a second balance column (7). The outer side of the second balance column (7) is rotatably sleeved with a sleeve column (71). The bottom of the sleeve column (71) is fixedly equipped with a sealing plate (72) that can be attracted by the magnetic attraction mechanism. A support platform (10) is fixedly installed on the bottom of the inner side of the first conveyor frame (5). An inclined platform (101) connected to the side of the support platform (10) is fixedly installed on the bottom of the inner side of the first conveyor frame (5). A bearing platform (102) connected to the inner side of the first conveyor frame (5) is fixedly installed on the side of the inclined platform (101) away from the support platform (10). The first conveyor frame (5) is rotatably connected to the inner side of the first balance column (6). The first balance column (6) is located directly above the bearing platform (102). The first conveyor frame (5) is equipped with a drive motor (51) on the outer side. The output end of the drive motor (51) is equipped with a reducer (52). The output end of the reducer (52) passes through the first conveyor frame (5) and is connected to the first balance column (6). The outer side of the first balance column (6) is fixedly sleeved with symmetrically distributed annular toothed discs (61). The outer side of the annular toothed discs (61) is meshed with a suspension chain (62). One end of the suspension chain (62) is fixedly connected to a gravity plate (63). The bottom of the gravity plate (63) is fixedly installed with a baffle (64). The vibration assembly (4) includes a support column (41) fixedly installed on the top of the base plate (1), a balance platform (42) fixedly installed on the top of the support column (41), a controller (43) installed on the side of the balance platform (42), a proximity switch (53) installed on the inner side of the first conveyor frame (5), a signal connection between the proximity switch (53) and the controller (43), and the proximity switch (53) is located between the sealing plate (72) and the baffle (64).

2. The loading height limiting device for fastener heat treatment according to claim 1, characterized in that: The top of the balance platform (42) is equipped with a vibrator (45) via a base (44). The bottoms of the two vibrators (45) are connected to the bottoms of the first conveyor frame (5) and the second conveyor frame (12). The top of the base plate (1) is fixedly equipped with a first support frame (2) that is movably connected to the bottom of the first conveyor frame (5). The top of the base plate (1) is fixedly equipped with a second support frame (3) that is movably connected to the bottom of the second conveyor frame (12).

3. A loading height limiting device for fastener heat treatment according to claim 1, characterized in that: The sealing plate (72) has a snap-fit ​​groove (73) on the side near the receiving plate (8) that is adapted to the bottom edge of the receiving plate (8).

4. A loading height limiting device for fastener heat treatment according to claim 1, characterized in that: The receiving plate (8) has an inner cavity (81) on its inner side. The receiving plate (8) has an inner groove (83) on the side near the sealing plate (72) that communicates with the inner cavity (81). The magnetic attraction mechanism includes a copper rod (82) inserted into the inner side of the inner groove (83) and a coil (84) wound around the surface of the copper rod (82). One end of the copper rod (82) extends into the inner cavity (81), and the end face of the other end of the copper rod (82) is flush with the side of the receiving plate (8).

5. A loading height limiting device for fastener heat treatment according to claim 1, characterized in that: The top of the bearing platform (102) is provided with uniformly distributed resistance grooves (105), the inclined surface of the tilting platform (101) is equipped with a buffer pad (104), and the top of the support platform (10) is connected to the bottom of the receiving plate (8) through a connecting seat (103).

6. A loading height limiting device for fastener heat treatment according to claim 1, characterized in that: A gravity bar (65) is fixedly installed at the other end of the suspension chain (62).

7. A loading height limiting device for fastener heat treatment according to claim 1, characterized in that: Separation plates (66) are fixedly installed at equal intervals on the bottom of one side of the baffle (64). The end of the separation plate (66) away from the baffle (64) and the bottom of the baffle (64) are both tapered.

8. A loading height limiting device for fastener heat treatment according to claim 1, characterized in that: The first conveyor frame (5) has symmetrically distributed limiting grooves (9) on its side. The two sides of the gravity plate (63) are slidably connected to the inner sides of the two limiting grooves (9). The two ends of the gravity plate (63) have symmetrically distributed through grooves (67). The inner side of the through groove (67) is slidably inserted with a vertical rod (91) fixedly connected to the inner side of the limiting groove (9). The outer side of the vertical rod (91) is sleeved with a limiting spring (92). The two ends of the limiting spring (92) are fixedly connected to the inner side of the limiting groove (9) and the outer side of the gravity plate (63).

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